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K_Werner

tunnel-up-initiator

K_Werner
Jul 17th, 2018
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  1. Frame 198: 170 bytes on wire (1360 bits), 170 bytes captured (1360 bits)
  2. Ethernet II, Src: RealtekU_12:35:02 (52:54:00:12:35:02), Dst: PcsCompu_49:c7:a0 (08:00:27:49:c7:a0)
  3. Internet Protocol Version 4, Src: 8.8.4.4, Dst: 172.31.0.1
  4. 0100 .... = Version: 4
  5. .... 0101 = Header Length: 20 bytes (5)
  6. Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
  7. Total Length: 156
  8. Identification: 0xbe91 (48785)
  9. Flags: 0x00
  10. Fragment offset: 0
  11. Time to live: 51
  12. Protocol: UDP (17)
  13. Header checksum: 0x1094 [validation disabled]
  14. [Header checksum status: Unverified]
  15. Source: 8.8.4.4
  16. Destination: 172.31.0.1
  17. [Source GeoIP: United States, AS15169 Google Inc., 37.750999, -97.821999]
  18. [Destination GeoIP: Unknown]
  19. User Datagram Protocol, Src Port: 53, Dst Port: 54238
  20. Source Port: 53
  21. Destination Port: 54238
  22. Length: 136
  23. Checksum: 0x43ca [unverified]
  24. [Checksum Status: Unverified]
  25. [Stream index: 9]
  26. Domain Name System (response)
  27. Transaction ID: 0xf26e
  28. Flags: 0x8180 Standard query response, No error
  29. Questions: 1
  30. Answer RRs: 6
  31. Authority RRs: 0
  32. Additional RRs: 0
  33. Queries
  34. www.google.com: type A, class IN
  35. Name: www.google.com
  36. [Name Length: 14]
  37. [Label Count: 3]
  38. Type: A (Host Address) (1)
  39. Class: IN (0x0001)
  40. Answers
  41. www.google.com: type A, class IN, addr 74.125.124.105
  42. Name: www.google.com
  43. Type: A (Host Address) (1)
  44. Class: IN (0x0001)
  45. Time to live: 138
  46. Data length: 4
  47. Address: 74.125.124.105
  48. www.google.com: type A, class IN, addr 74.125.124.99
  49. Name: www.google.com
  50. Type: A (Host Address) (1)
  51. Class: IN (0x0001)
  52. Time to live: 138
  53. Data length: 4
  54. Address: 74.125.124.99
  55. www.google.com: type A, class IN, addr 74.125.124.103
  56. Name: www.google.com
  57. Type: A (Host Address) (1)
  58. Class: IN (0x0001)
  59. Time to live: 138
  60. Data length: 4
  61. Address: 74.125.124.103
  62. www.google.com: type A, class IN, addr 74.125.124.104
  63. Name: www.google.com
  64. Type: A (Host Address) (1)
  65. Class: IN (0x0001)
  66. Time to live: 138
  67. Data length: 4
  68. Address: 74.125.124.104
  69. www.google.com: type A, class IN, addr 74.125.124.106
  70. Name: www.google.com
  71. Type: A (Host Address) (1)
  72. Class: IN (0x0001)
  73. Time to live: 138
  74. Data length: 4
  75. Address: 74.125.124.106
  76. www.google.com: type A, class IN, addr 74.125.124.147
  77. Name: www.google.com
  78. Type: A (Host Address) (1)
  79. Class: IN (0x0001)
  80. Time to live: 138
  81. Data length: 4
  82. Address: 74.125.124.147
  83.  
  84. Frame 200: 102 bytes on wire (816 bits), 102 bytes captured (816 bits)
  85. Ethernet II, Src: RealtekU_12:35:02 (52:54:00:12:35:02), Dst: PcsCompu_49:c7:a0 (08:00:27:49:c7:a0)
  86. Internet Protocol Version 4, Src: 8.8.4.4, Dst: 172.31.0.1
  87. 0100 .... = Version: 4
  88. .... 0101 = Header Length: 20 bytes (5)
  89. Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
  90. Total Length: 88
  91. Identification: 0xe9d3 (59859)
  92. Flags: 0x00
  93. Fragment offset: 0
  94. Time to live: 51
  95. Protocol: UDP (17)
  96. Header checksum: 0xe595 [validation disabled]
  97. [Header checksum status: Unverified]
  98. Source: 8.8.4.4
  99. Destination: 172.31.0.1
  100. [Source GeoIP: United States, AS15169 Google Inc., 37.750999, -97.821999]
  101. [Destination GeoIP: Unknown]
  102. User Datagram Protocol, Src Port: 53, Dst Port: 54238
  103. Source Port: 53
  104. Destination Port: 54238
  105. Length: 68
  106. Checksum: 0x28e5 [unverified]
  107. [Checksum Status: Unverified]
  108. [Stream index: 9]
  109. Domain Name System (response)
  110. Transaction ID: 0x0e65
  111. Flags: 0x8180 Standard query response, No error
  112. Questions: 1
  113. Answer RRs: 1
  114. Authority RRs: 0
  115. Additional RRs: 0
  116. Queries
  117. www.google.com: type AAAA, class IN
  118. Name: www.google.com
  119. [Name Length: 14]
  120. [Label Count: 3]
  121. Type: AAAA (IPv6 Address) (28)
  122. Class: IN (0x0001)
  123. Answers
  124. www.google.com: type AAAA, class IN, addr 2607:f8b0:4001:c12::68
  125. Name: www.google.com
  126. Type: AAAA (IPv6 Address) (28)
  127. Class: IN (0x0001)
  128. Time to live: 299
  129. Data length: 16
  130. AAAA Address: 2607:f8b0:4001:c12::68
  131.  
  132. Frame 208: 74 bytes on wire (592 bits), 74 bytes captured (592 bits)
  133. Ethernet II, Src: RealtekU_12:35:02 (52:54:00:12:35:02), Dst: PcsCompu_49:c7:a0 (08:00:27:49:c7:a0)
  134. Internet Protocol Version 4, Src: 74.125.124.105, Dst: 172.31.0.1
  135. 0100 .... = Version: 4
  136. .... 0101 = Header Length: 20 bytes (5)
  137. Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
  138. Total Length: 60
  139. Identification: 0x0000 (0)
  140. Flags: 0x02 (Don't Fragment)
  141. Fragment offset: 0
  142. Time to live: 63
  143. Protocol: TCP (6)
  144. Header checksum: 0xc8b5 [validation disabled]
  145. [Header checksum status: Unverified]
  146. Source: 74.125.124.105
  147. Destination: 172.31.0.1
  148. [Source GeoIP: United States, AS15169 Google Inc., Mountain View, CA, 37.419201, -122.057404]
  149. [Destination GeoIP: Unknown]
  150. Transmission Control Protocol, Src Port: 443, Dst Port: 39190, Seq: 0, Ack: 1, Len: 0
  151. Source Port: 443
  152. Destination Port: 39190
  153. [Stream index: 6]
  154. [TCP Segment Len: 0]
  155. Sequence number: 0 (relative sequence number)
  156. Acknowledgment number: 1 (relative ack number)
  157. Header Length: 40 bytes
  158. Flags: 0x012 (SYN, ACK)
  159. 000. .... .... = Reserved: Not set
  160. ...0 .... .... = Nonce: Not set
  161. .... 0... .... = Congestion Window Reduced (CWR): Not set
  162. .... .0.. .... = ECN-Echo: Not set
  163. .... ..0. .... = Urgent: Not set
  164. .... ...1 .... = Acknowledgment: Set
  165. .... .... 0... = Push: Not set
  166. .... .... .0.. = Reset: Not set
  167. .... .... ..1. = Syn: Set
  168. [Expert Info (Chat/Sequence): Connection establish acknowledge (SYN+ACK): server port 443]
  169. [Connection establish acknowledge (SYN+ACK): server port 443]
  170. [Severity level: Chat]
  171. [Group: Sequence]
  172. .... .... ...0 = Fin: Not set
  173. [TCP Flags: ·······A··S·]
  174. Window size value: 28160
  175. [Calculated window size: 28160]
  176. Checksum: 0x0620 [unverified]
  177. [Checksum Status: Unverified]
  178. Urgent pointer: 0
  179. Options: (20 bytes), Maximum segment size, SACK permitted, Timestamps, No-Operation (NOP), Window scale
  180. Maximum segment size: 1360 bytes
  181. TCP SACK Permitted Option: True
  182. Timestamps: TSval 791361978, TSecr 82386
  183. No-Operation (NOP)
  184. Type: 1
  185. 0... .... = Copy on fragmentation: No
  186. .00. .... = Class: Control (0)
  187. ...0 0001 = Number: No-Operation (NOP) (1)
  188. Window scale: 8 (multiply by 256)
  189.  
  190. Frame 212: 74 bytes on wire (592 bits), 74 bytes captured (592 bits)
  191. Ethernet II, Src: RealtekU_12:35:02 (52:54:00:12:35:02), Dst: PcsCompu_49:c7:a0 (08:00:27:49:c7:a0)
  192. Internet Protocol Version 4, Src: 74.125.124.105, Dst: 172.31.0.1
  193. 0100 .... = Version: 4
  194. .... 0101 = Header Length: 20 bytes (5)
  195. Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
  196. Total Length: 60
  197. Identification: 0x0000 (0)
  198. Flags: 0x02 (Don't Fragment)
  199. Fragment offset: 0
  200. Time to live: 63
  201. Protocol: TCP (6)
  202. Header checksum: 0xc8b5 [validation disabled]
  203. [Header checksum status: Unverified]
  204. Source: 74.125.124.105
  205. Destination: 172.31.0.1
  206. [Source GeoIP: United States, AS15169 Google Inc., Mountain View, CA, 37.419201, -122.057404]
  207. [Destination GeoIP: Unknown]
  208. Transmission Control Protocol, Src Port: 443, Dst Port: 39190, Seq: 0, Ack: 1, Len: 0
  209. Source Port: 443
  210. Destination Port: 39190
  211. [Stream index: 6]
  212. [TCP Segment Len: 0]
  213. Sequence number: 0 (relative sequence number)
  214. Acknowledgment number: 1 (relative ack number)
  215. Header Length: 40 bytes
  216. Flags: 0x012 (SYN, ACK)
  217. 000. .... .... = Reserved: Not set
  218. ...0 .... .... = Nonce: Not set
  219. .... 0... .... = Congestion Window Reduced (CWR): Not set
  220. .... .0.. .... = ECN-Echo: Not set
  221. .... ..0. .... = Urgent: Not set
  222. .... ...1 .... = Acknowledgment: Set
  223. .... .... 0... = Push: Not set
  224. .... .... .0.. = Reset: Not set
  225. .... .... ..1. = Syn: Set
  226. [Expert Info (Chat/Sequence): Connection establish acknowledge (SYN+ACK): server port 443]
  227. [Connection establish acknowledge (SYN+ACK): server port 443]
  228. [Severity level: Chat]
  229. [Group: Sequence]
  230. .... .... ...0 = Fin: Not set
  231. [TCP Flags: ·······A··S·]
  232. Window size value: 28160
  233. [Calculated window size: 28160]
  234. Checksum: 0x04f5 [unverified]
  235. [Checksum Status: Unverified]
  236. Urgent pointer: 0
  237. Options: (20 bytes), Maximum segment size, SACK permitted, Timestamps, No-Operation (NOP), Window scale
  238. Maximum segment size: 1360 bytes
  239. TCP SACK Permitted Option: True
  240. Timestamps: TSval 791362277, TSecr 82386
  241. No-Operation (NOP)
  242. Type: 1
  243. 0... .... = Copy on fragmentation: No
  244. .00. .... = Class: Control (0)
  245. ...0 0001 = Number: No-Operation (NOP) (1)
  246. Window scale: 8 (multiply by 256)
  247. [SEQ/ACK analysis]
  248. [TCP Analysis Flags]
  249. [Expert Info (Note/Sequence): This frame is a (suspected) retransmission]
  250. [This frame is a (suspected) retransmission]
  251. [Severity level: Note]
  252. [Group: Sequence]
  253. [The RTO for this segment was: 0.090266000 seconds]
  254. [RTO based on delta from frame: 208]
  255.  
  256. Frame 270: 66 bytes on wire (528 bits), 66 bytes captured (528 bits)
  257. Ethernet II, Src: RealtekU_12:35:02 (52:54:00:12:35:02), Dst: PcsCompu_49:c7:a0 (08:00:27:49:c7:a0)
  258. Internet Protocol Version 4, Src: 74.125.124.105, Dst: 172.31.0.1
  259. 0100 .... = Version: 4
  260. .... 0101 = Header Length: 20 bytes (5)
  261. Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
  262. Total Length: 52
  263. Identification: 0x0000 (0)
  264. Flags: 0x02 (Don't Fragment)
  265. Fragment offset: 0
  266. Time to live: 63
  267. Protocol: TCP (6)
  268. Header checksum: 0xc8bd [validation disabled]
  269. [Header checksum status: Unverified]
  270. Source: 74.125.124.105
  271. Destination: 172.31.0.1
  272. [Source GeoIP: United States, AS15169 Google Inc., Mountain View, CA, 37.419201, -122.057404]
  273. [Destination GeoIP: Unknown]
  274. Transmission Control Protocol, Src Port: 443, Dst Port: 39190, Seq: 2316, Ack: 196, Len: 0
  275. Source Port: 443
  276. Destination Port: 39190
  277. [Stream index: 6]
  278. [TCP Segment Len: 0]
  279. Sequence number: 2316 (relative sequence number)
  280. Acknowledgment number: 196 (relative ack number)
  281. Header Length: 32 bytes
  282. Flags: 0x011 (FIN, ACK)
  283. 000. .... .... = Reserved: Not set
  284. ...0 .... .... = Nonce: Not set
  285. .... 0... .... = Congestion Window Reduced (CWR): Not set
  286. .... .0.. .... = ECN-Echo: Not set
  287. .... ..0. .... = Urgent: Not set
  288. .... ...1 .... = Acknowledgment: Set
  289. .... .... 0... = Push: Not set
  290. .... .... .0.. = Reset: Not set
  291. .... .... ..0. = Syn: Not set
  292. .... .... ...1 = Fin: Set
  293. [Expert Info (Chat/Sequence): Connection finish (FIN)]
  294. [Connection finish (FIN)]
  295. [Severity level: Chat]
  296. [Group: Sequence]
  297. [TCP Flags: ·······A···F]
  298. Window size value: 115
  299. [Calculated window size: 29440]
  300. [Window size scaling factor: 256]
  301. Checksum: 0x6ca7 [unverified]
  302. [Checksum Status: Unverified]
  303. Urgent pointer: 0
  304. Options: (12 bytes), No-Operation (NOP), No-Operation (NOP), Timestamps
  305. No-Operation (NOP)
  306. Type: 1
  307. 0... .... = Copy on fragmentation: No
  308. .00. .... = Class: Control (0)
  309. ...0 0001 = Number: No-Operation (NOP) (1)
  310. No-Operation (NOP)
  311. Type: 1
  312. 0... .... = Copy on fragmentation: No
  313. .00. .... = Class: Control (0)
  314. ...0 0001 = Number: No-Operation (NOP) (1)
  315. Timestamps: TSval 791372687, TSecr 82845
  316.  
  317. Frame 289: 66 bytes on wire (528 bits), 66 bytes captured (528 bits)
  318. Ethernet II, Src: RealtekU_12:35:02 (52:54:00:12:35:02), Dst: PcsCompu_49:c7:a0 (08:00:27:49:c7:a0)
  319. Internet Protocol Version 4, Src: 74.125.124.105, Dst: 172.31.0.1
  320. 0100 .... = Version: 4
  321. .... 0101 = Header Length: 20 bytes (5)
  322. Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
  323. Total Length: 52
  324. Identification: 0x0000 (0)
  325. Flags: 0x02 (Don't Fragment)
  326. Fragment offset: 0
  327. Time to live: 63
  328. Protocol: TCP (6)
  329. Header checksum: 0xc8bd [validation disabled]
  330. [Header checksum status: Unverified]
  331. Source: 74.125.124.105
  332. Destination: 172.31.0.1
  333. [Source GeoIP: United States, AS15169 Google Inc., Mountain View, CA, 37.419201, -122.057404]
  334. [Destination GeoIP: Unknown]
  335. Transmission Control Protocol, Src Port: 443, Dst Port: 39190, Seq: 2317, Ack: 196, Len: 0
  336. Source Port: 443
  337. Destination Port: 39190
  338. [Stream index: 6]
  339. [TCP Segment Len: 0]
  340. Sequence number: 2317 (relative sequence number)
  341. Acknowledgment number: 196 (relative ack number)
  342. Header Length: 32 bytes
  343. Flags: 0x010 (ACK)
  344. 000. .... .... = Reserved: Not set
  345. ...0 .... .... = Nonce: Not set
  346. .... 0... .... = Congestion Window Reduced (CWR): Not set
  347. .... .0.. .... = ECN-Echo: Not set
  348. .... ..0. .... = Urgent: Not set
  349. .... ...1 .... = Acknowledgment: Set
  350. .... .... 0... = Push: Not set
  351. .... .... .0.. = Reset: Not set
  352. .... .... ..0. = Syn: Not set
  353. .... .... ...0 = Fin: Not set
  354. [TCP Flags: ·······A····]
  355. Window size value: 115
  356. [Calculated window size: 29440]
  357. [Window size scaling factor: 256]
  358. Checksum: 0x3a1f [unverified]
  359. [Checksum Status: Unverified]
  360. Urgent pointer: 0
  361. Options: (12 bytes), No-Operation (NOP), No-Operation (NOP), Timestamps
  362. No-Operation (NOP)
  363. Type: 1
  364. 0... .... = Copy on fragmentation: No
  365. .00. .... = Class: Control (0)
  366. ...0 0001 = Number: No-Operation (NOP) (1)
  367. No-Operation (NOP)
  368. Type: 1
  369. 0... .... = Copy on fragmentation: No
  370. .00. .... = Class: Control (0)
  371. ...0 0001 = Number: No-Operation (NOP) (1)
  372. Timestamps: TSval 791383117, TSecr 85351
  373. [SEQ/ACK analysis]
  374. [TCP Analysis Flags]
  375. [This is a TCP duplicate ack]
  376. [Duplicate ACK #: 1]
  377. [Duplicate to the ACK in frame: 217]
  378. [Expert Info (Note/Sequence): Duplicate ACK (#1)]
  379. [Duplicate ACK (#1)]
  380. [Severity level: Note]
  381. [Group: Sequence]
  382.  
  383. Frame 396: 66 bytes on wire (528 bits), 66 bytes captured (528 bits)
  384. Ethernet II, Src: RealtekU_12:35:02 (52:54:00:12:35:02), Dst: PcsCompu_49:c7:a0 (08:00:27:49:c7:a0)
  385. Internet Protocol Version 4, Src: 74.125.124.105, Dst: 172.31.0.1
  386. 0100 .... = Version: 4
  387. .... 0101 = Header Length: 20 bytes (5)
  388. Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
  389. Total Length: 52
  390. Identification: 0x0000 (0)
  391. Flags: 0x02 (Don't Fragment)
  392. Fragment offset: 0
  393. Time to live: 63
  394. Protocol: TCP (6)
  395. Header checksum: 0xc8bd [validation disabled]
  396. [Header checksum status: Unverified]
  397. Source: 74.125.124.105
  398. Destination: 172.31.0.1
  399. [Source GeoIP: United States, AS15169 Google Inc., Mountain View, CA, 37.419201, -122.057404]
  400. [Destination GeoIP: Unknown]
  401. Transmission Control Protocol, Src Port: 443, Dst Port: 39190, Seq: 2317, Ack: 196, Len: 0
  402. Source Port: 443
  403. Destination Port: 39190
  404. [Stream index: 6]
  405. [TCP Segment Len: 0]
  406. Sequence number: 2317 (relative sequence number)
  407. Acknowledgment number: 196 (relative ack number)
  408. Header Length: 32 bytes
  409. Flags: 0x010 (ACK)
  410. 000. .... .... = Reserved: Not set
  411. ...0 .... .... = Nonce: Not set
  412. .... 0... .... = Congestion Window Reduced (CWR): Not set
  413. .... .0.. .... = ECN-Echo: Not set
  414. .... ..0. .... = Urgent: Not set
  415. .... ...1 .... = Acknowledgment: Set
  416. .... .... 0... = Push: Not set
  417. .... .... .0.. = Reset: Not set
  418. .... .... ..0. = Syn: Not set
  419. .... .... ...0 = Fin: Not set
  420. [TCP Flags: ·······A····]
  421. Window size value: 115
  422. [Calculated window size: 29440]
  423. [Window size scaling factor: 256]
  424. Checksum: 0x112b [unverified]
  425. [Checksum Status: Unverified]
  426. Urgent pointer: 0
  427. Options: (12 bytes), No-Operation (NOP), No-Operation (NOP), Timestamps
  428. No-Operation (NOP)
  429. Type: 1
  430. 0... .... = Copy on fragmentation: No
  431. .00. .... = Class: Control (0)
  432. ...0 0001 = Number: No-Operation (NOP) (1)
  433. No-Operation (NOP)
  434. Type: 1
  435. 0... .... = Copy on fragmentation: No
  436. .00. .... = Class: Control (0)
  437. ...0 0001 = Number: No-Operation (NOP) (1)
  438. Timestamps: TSval 791393601, TSecr 85351
  439. [SEQ/ACK analysis]
  440. [TCP Analysis Flags]
  441. [This is a TCP duplicate ack]
  442. [Duplicate ACK #: 2]
  443. [Duplicate to the ACK in frame: 217]
  444. [Expert Info (Note/Sequence): Duplicate ACK (#2)]
  445. [Duplicate ACK (#2)]
  446. [Severity level: Note]
  447. [Group: Sequence]
  448.  
  449. Frame 453: 66 bytes on wire (528 bits), 66 bytes captured (528 bits)
  450. Ethernet II, Src: RealtekU_12:35:02 (52:54:00:12:35:02), Dst: PcsCompu_49:c7:a0 (08:00:27:49:c7:a0)
  451. Internet Protocol Version 4, Src: 74.125.124.105, Dst: 172.31.0.1
  452. 0100 .... = Version: 4
  453. .... 0101 = Header Length: 20 bytes (5)
  454. Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
  455. Total Length: 52
  456. Identification: 0x0000 (0)
  457. Flags: 0x02 (Don't Fragment)
  458. Fragment offset: 0
  459. Time to live: 63
  460. Protocol: TCP (6)
  461. Header checksum: 0xc8bd [validation disabled]
  462. [Header checksum status: Unverified]
  463. Source: 74.125.124.105
  464. Destination: 172.31.0.1
  465. [Source GeoIP: United States, AS15169 Google Inc., Mountain View, CA, 37.419201, -122.057404]
  466. [Destination GeoIP: Unknown]
  467. Transmission Control Protocol, Src Port: 443, Dst Port: 39190, Seq: 2317, Ack: 196, Len: 0
  468. Source Port: 443
  469. Destination Port: 39190
  470. [Stream index: 6]
  471. [TCP Segment Len: 0]
  472. Sequence number: 2317 (relative sequence number)
  473. Acknowledgment number: 196 (relative ack number)
  474. Header Length: 32 bytes
  475. Flags: 0x010 (ACK)
  476. 000. .... .... = Reserved: Not set
  477. ...0 .... .... = Nonce: Not set
  478. .... 0... .... = Congestion Window Reduced (CWR): Not set
  479. .... .0.. .... = ECN-Echo: Not set
  480. .... ..0. .... = Urgent: Not set
  481. .... ...1 .... = Acknowledgment: Set
  482. .... .... 0... = Push: Not set
  483. .... .... .0.. = Reset: Not set
  484. .... .... ..0. = Syn: Not set
  485. .... .... ...0 = Fin: Not set
  486. [TCP Flags: ·······A····]
  487. Window size value: 115
  488. [Calculated window size: 29440]
  489. [Window size scaling factor: 256]
  490. Checksum: 0xe6f4 [unverified]
  491. [Checksum Status: Unverified]
  492. Urgent pointer: 0
  493. Options: (12 bytes), No-Operation (NOP), No-Operation (NOP), Timestamps
  494. No-Operation (NOP)
  495. Type: 1
  496. 0... .... = Copy on fragmentation: No
  497. .00. .... = Class: Control (0)
  498. ...0 0001 = Number: No-Operation (NOP) (1)
  499. No-Operation (NOP)
  500. Type: 1
  501. 0... .... = Copy on fragmentation: No
  502. .00. .... = Class: Control (0)
  503. ...0 0001 = Number: No-Operation (NOP) (1)
  504. Timestamps: TSval 791404407, TSecr 85351
  505. [SEQ/ACK analysis]
  506. [TCP Analysis Flags]
  507. [This is a TCP duplicate ack]
  508. [Duplicate ACK #: 3]
  509. [Duplicate to the ACK in frame: 217]
  510. [Expert Info (Note/Sequence): Duplicate ACK (#3)]
  511. [Duplicate ACK (#3)]
  512. [Severity level: Note]
  513. [Group: Sequence]
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